Measure out the grid using a 30cm ruler and pencil. You will need to divide each side into 4 (approximately every 7.5cm along short length and 10.5cm along the long length) and then connect up the marks.
You should also add a 4x4 grid to your edited photograph from the previous task. You could either add this grid using the computer or you could draw it on using the ruler.
When ready you should begin drawing out the image and then move onto paint.
Keep in touch with Mrs Way in terms of asking questions and showing your progress.